MayaVi косяк делать Plot3D для линии многоугольника на плоскости

Question

У меня есть данные многоугольника координаты х, у, г:

(теперь я правильно отформатированные данные ...)

х, у, г = [ -5.386, -5.386, -5.386, -5.386, -5.386, -5.386, -5.386, -5.386, -5.386, -5.386, -5.386, -5.386, -5.386, -5.386, -5.386, -5.386, -5.386 , -5.386, -5.386, -5.386, -5.386, -5.386, -5.386, -5.386, -5.386, -5.386, -5.386, -5.386, -5.386, -5.386, -5.386, -5.386, -5.386, - 5.386, -5.386, -5.386, -5.386, -5.386, -5.386, -5.386, -5.386, -5.386, -5.386, -5.386, -5.386, -5.386, -5.386, -5.386, -5.386, -5.386, -5.386, -5.386, -5.386, -5.386, -5.386, -5.386, -5.386, -5.386, -5.386, -5.386, -5.386, -5.386, -5.386, -5.386, -5.386, -5.386, -5.386 , -5.386, -5.386, -5.386, -5.386, -5.386, -5.386, -5.386, -5.386, -5.386, -5.386, -5.386, -5.386, -5.386, -5.386, -5.386, -5.386, - 5.386, -5.386, -5.386, -5.386, -5.386, -5.386, -5.386, -5.386, -5.386, -5.386, -5.386, -5.386, -5.386, -5.386, -5.386, -5.386, -5.386, -5.386, -5.386, -5.386, -5.386, -5.386, -5.386, -5.386, -5.386, -5.386, -5.386, -5.386, -5.386, -5.386, -5.386, -5.386, -5.386, -5.386 , -5.386, -5.386, -5.386, -5.386, -5.386, -5.386, -5.386, -5.386, -5.386, -5.386, -5.386, -5.386, -5.386, -5.386, -5.386, -5.386, - 5.386, -5.386, -5.386, -5.386, -5.386, -5.386, -5.386, -5.386, -5.386, -5.386, -5.386, -5.386, -5.386, -5.386, -5.386, -5.386, -5.386, -5.386, -5.386, -5.386, -5.386, -5.386, -5.386, -5.386, -5.386, -5.386, -5.386, -5.386, -5.386, -5.386, -5.386, -5.386, -5.386, -5.386 , -5.386, -5.386, -5.386, -5.386, -5.386, -5.386, -5.386, -5.386, -5.386, -5.386, -5.386, -5.386, -5.386, -5.386, -5.386, -5.386, - 5.386, -5.386, -5.386, -5.386, -5.386, -5.386, -5.386, -5.386, -5.386 , -5.386, -5.386, -5.386, -5.386, -5.386, -5.386, -5.386, -5.386, -5.386, -5.386, -5.386, -5.386, -5.386, -5.386, -5.386, -5.386, - 5.386, -5.386, -5.386, -5.386, -5.386, -5.386, -5.386, -5.386, -5.386, -5.386, -5.386, -5.386, -5.386, -5.386, -5.386, -5.386, -5.386, -5.386, -5.386, -5.386, -5.386, -5.386, -5.386, -5.386, -5.386, -5.386, -5.386, -5.386, -5.386, -5.386, -5.386, -5.386, -5.386, -5.386 , -5.386, -5.386, -5.386, -5.386, -5.386, -5.386, -5.386, -5.386, -5.386, -5.386, -5.386, -5.386, -5.386, -5.386], [- 8.96564198, -8.91759205 , -8.91759205, -8.85157394, -8.85157394, -8.10881138, -8.10881138, -8.04073524, -8.04073524, -7.29788256, -7.29788256, -7.22981453, -6.48705292, -6.48705292, -6.41897631, -6.41897631, -5.67612362, - 5.67612362, -5.60804701, -560804701, -4.8652854, -4.8652854, -4.79720879, -4.79720879, -4.0543561, -4.0543561, -3.98628807, -3.98628807, -3.24352646, -3.24352646, -3.17545009, -3.17545009, -2.43259692, -2.43259692, -2.36452055, -2.36452055, -1.62175 894, -1,62175894, -1,55369115, -1,55369115, -0,8108381, -0,8108381, -0,06807642, -0,06807642, 0,0, 0,0, 0,06844116, 0,06844116, 0,81120288, 0,81120288, 0,87964404, 0,87964404, 1,62249708, 1,62249708, 1,69094694, 1,69094694, 2,43370867, 2,43370867 , 2.50214982, 2.50214982, 3.24500275, 3.24500275, 3.3134439, 3.3134439, 4.05620575, 4.05620575, 4.12464666, 4.12464666, 4.86749983, 4.86749983, 4.93594122, 4.93594122, 5.67870283, 5.67870283, 5.74715233, 5.74715233, 6.49000549, 6.49000549, 6.55844688, 6.55844688, 7.3012085, 7.3012085, 7.36964941 , 7.36964941, 8.11250305, 8.11250305, 8.17483044, 8.17483044, 8.91759205, 8.91759205, 8.96564198, 8.96564198, 9.00691128, 9.00691128, 9.69999981, 9.69999981, 9.88442802, 9.88442802, 9.93230438, 9.93230438, 10.1330328, 10.1330328, 10.10715866, 10.10715866, 10.30800629, 10.30800629, 10.31350517, 10.31350517 , 10.47220325, 10.47220325, 10.47767353, 10.47767353, 10.5281105, 10.5281105, 10.53109264, 10.53109264, 10.5381422, 10.5381422, 10.53948784, 10.53948784 , 10.52461624, 10.52461624, 10.52502251, 10.52502251, 10.50097942, 10.50097942, 10.50071716, 10.50071716, 10.48459435, 10.48459435, 10.39999962, 10.39999962, 9.60570526, 9.60570526, 9.56569958, 9.56569958, 8.55252838, 8.55252838, 8.50290012, 8.50290012, 7.48804045, 7.48804045, 7.44000006, 7.44000006, 6.42374277 , 6.42374277, 6.37720013, 6.37720013, 5.35944319, 5.35944319, 5.31430006, 5.31430006, 4.29522181, 4.29522181, 4.25139999, 4.25139999, 3.23117161, 3.23117161, 3.18860006, 3.18860006, 2.16709828, 2.16709828, 2.1257, 2.1257, 1.10318041, 1.10318041, 1.06289995, 1.06289995, 0.0392214, 0.0392214 , 0,0, 0,0, -1.03653765, -1.03653765, -1.07512617, -1.07512617, -2.11073256, -2.11073256, -2.15035224, -2.15035224, -3.18478632, -3.18478632, -3.22547793, -3.22547793, -4.25886393, -4.25886393, -4.30070353, -4.30070353, -5.33279181, -5.33279181, -5.37582827, -6.40673113, -6.40673113, -6.45105314, -6.45105314, -7.48050976, -7.48050976, -7.52618217, -7.52618217, -8.55428886, -8.55428886, -8.6014061, -8.6014061, -9.62787724, -9.62787724, -9.67652988, -9.67652988, -10.36547565, -10.36547565, -10.39999962, -10.39999962, -10.41505051, -10.41505051, -10.52405071, -10.52405071, -10.52689934, -10.52689934, -10.53348255, -10.53348255, -10.53496647, -10.53496647, -10.55486393, -10.55437393, -10.55375099, -10.55375099, -10.56892776, -10.56892776, -10.56253052, -10.56037807, -10.56037807, -10.54539394, -10.54539394, -10.50701427 , -10.50701427, -10.47525024, -10.47525024, -10.35439491, -10.34539241, -10.34592438, -10.34592438, -10.25755596, -10.25755596, -10.10438442, -10.10438442, -9.99352741, -9.99352741, -9.69999981, -9.69999981, -9.65165234, - 9.65165234, -8,96564198, -8,96564198, -8,91759205], [1,74571705, 1,74667001, 1,74667001, 1,74667001, 1,74667001, 1,74667001, 1,74667001, 1,74667001, 1,74667001, 1,74667001, 1,74667001, 1,74667001, 1,74667001, 1,74667001, 1,74667001, 1,74667001, 1,74667001, 1,74667001, 1,74667001 , 1.74667001, 1.74667001, 1.74667001, 1.74667001, 1.74667001, 1.74667001, 1.74667001, 1.74667001, 1.74667001, 1.74667001, 1.74667001, 1.74667001, 1.74667001, 1.74667001, 1.74667001, 1.74667001, 1.74667001, 1.74667001, 1.74667001, 1.74667001, 1.74667001, 1.74667001, 1.74667001, 1.74667001, 1.74667001, 1.74667001, 1.74667001, 1.74667001, 1.74667001, 1.74667001, 1.74667001, 1.74667001, 1.74667001, 1.74667001, 1.74667001, 1.74667001, 1.74667001, 1.74667001, 1.74667001, 1.74667001, 1.74667001, 1.74667001, 1.74667001, 1.74667001, 1.74667001, 1.74667001, 1.74667001, 1.74667001, 1.74667001, 1.74667001, 1.74667001, 1.74667001, 1.74667001, 1.74667001, 1.74667001, 1.74667001, 1.74667001, 1.74667001, 1.74667001, 1.74667001, 1.74667001, 1.74667001, 1.74667001, 1.74667001, 1.74667001, 1.74667001, 1.74667001, 1.74667001, 1.74667001, 1.74667001, 1.74667001, 1.74667001, 1.74571705, 1.74571705, 1.75442255, 1.75442255, 1.75442255, 1.75442255, 1,82700002, 1,82700002, 1,96033335, 1,96033335, 2,36971664, 2,36971664, 2,46872306, 2,46872306, 2,93 799996, 2,93799996, 3,10320163, 3,10320163, 3,97582817, 3,97582817, 4,14201975, 4,14201975, 5,02765846, 5,02765846, 5,19697523, 5,19697523, 6,08110237, 6,08110237, 6,25430679, 6,25430679, 7,13444996, 7,13444996, 7,31143522, 7,31143522, 8,18754387, 8,18754387, 8,36124897, 8,36124897, 9,22200012, 9.22200012, 9.22200012, 9.22200012, 9.22200012, 9.22200012, 9.22200012, 9.22200012, 9.22200012, 9.22200012, 9.22200012, 9.22200012, 9.22200012, 9.22200012, 9.22200012, 9.22200012, 9.22200012, 9.22200012, 9.22200012, 9.22200012, 9.22200012, 9.22200012, 9.22200012, 9.22200012, 9.22200012, 9.22200012, 9.22200012, 9.22200012, 9.22200012, 9.22200012, 9.22200012, 9.22200012, 9.22200012, 9.22200012, 9.22200012, 9.22200012, 9.22200012, 9.22200012, 9.22200012, 9.22200012, 9.22200012, 9.22200012, 9.22200012, 9.22200012, 9.22200012, 9.22200012, 9.22200012, 9.22200012, 9.22200012, 9.22200012, 9.22200012, 9.22200012, 9.22200012, 9.22200012, 9.22200012, 9.22200012, 9.22200012, 9.22200012, 9.22200012, 9.222000 12, 9,22200012, 9,22200012, 9,22200012, 9,22200012, 9,22200012, 9,22200012, 9,22200012, 9,22200012, 9,22200012, 9,22200012, 9,22200012, 9,22200012, 9,22200012, 9,22200012, 9,22200012, 9,22200012, 9,22200012, 9,22200012, 9,22200012, 9,22200012, 9,22200012, 9,22200012, 9,22200012, 9,22200012, 9.22200012, 9.22200012, 9.22200012, 9.22200012, 8.99069691, 8.99069691, 8.55359173, 8.55359173, 8.16760635, 8.16760635, 7.44270992, 7.44270992, 7.05001211, 7.05001211, 6.30944681, 6.30944681, 5.93197727, 5.93197727, 5.17690754, 5.17690754, 4.80531073, 4.80531073, 4.04644012, 4.04644012, 3.62315774, 3.62315774, 2.93799996, 2.93799996, 2.57678986, 2.57678986, 2.37031913, 2.37031913, 2.0530901, 2.0530901, 1.82700002, 1.82700002, 1.75442255, 1.75442255, 1.74571705, 1.74571705, 1.74571705, 1.74571705, 1.74667001]

И когда я пытаюсь сделать:

import mayavi.mlab as mvi 

mvi.plot3d(x,y,z) 
mvi.show() 

Это показывает пустой участок ...

Но это работает, и показать глифы и точки:

import mayavi.mlab as mvi 

mvi.points3d(x,y,z) 
mvi.show() 

Что здесь происходит?

Answer 1

При тестировании кода, у меня есть предупреждение:

Generic Warning: In /build/vtk6-MXHdkt/vtk6-6.3.0+dfsg1/Common/DataModel/vtkPolyLine.cxx, line 197 
Coincident points in polyline...can't compute normals 

Warning: In /build/vtk6-MXHdkt/vtk6-6.3.0+dfsg1/Filters/Core/vtkTubeFilter.cxx, line 243 
vtkTubeFilter (0x52e7970): Could not generate normals for line. Skipping to next. 

can't compute normals, вероятно, означает, что у вас есть последовательные точки данных, которые накладываются.

Одним из вариантов является добавление опции tube_radius=None. Таким образом, VTK не рисует трубку, которая следует за вашими точками данных, а просто связывает их с простой линией, см. http://docs.enthought.com/mayavi/mayavi/auto/mlab_helper_functions.html#plot3d